How to do the sign test

Question 1

What is it for ?

Answer 1

Test the statistical significance of differences between related pairs

Question 2

How do you know if the Observed value (S) are statistically significant ?

Answer 2

If the observed value (S) = equal/less than the critical value (cv)

Question 3

Step 1

Answer 3

Add up the number of positives/negatives ignore any 0

Question 4

Step 2

Answer 4

Add up the number of times the less frequent sign occurs

Question 5

Step 3

Answer 5

N= the number of participants (ignore any that were 0)

Question 6

Step 4

Answer 6

Determine whether it is one tailed or two tailed
One tailed = Directional
Two tailed = Non directional
Null hypothesis = ppts that are 0

Question 7

Step 5

Answer 7

Use the critical value table

Question 8

Step 6

Answer 8

Observed value must be lower than the critical value for the result to be significant.